/********************************************************/
/*   2019/11/05
*   连卡佛哈利
*   STM32 7针 0.96 OLED HAL库显示驱动
*********************************************************
*   引脚定义：
*   OLED_CS OLED_RES OLED_DC OUTPUT    Output push pull
*********************************************************
*   SPI定义：
*   Mode:Transmit only Master
*   Hardware Nss Signal:Disable
*   Data Size : 8Bits
*   First Bit : MSB First
*   CPOL : Low
*   CPHA : 1 Edge
*********************************************************
*   接线：
*   GND ---> GND
*   VCC ---> 3.3V
*   DO  ---> SPI_SCK
*   D1  ---> SPI_MOSI
*   RES ---> PB8
*   DC  ---> PB6
*   CS  ---> PB4
*
*/
/********************************************************/
#include "oled.h"
#include "stdlib.h"
#include "oledfont.h"
#include "main.h"
#include "spi.h"

uint8_t OLED_GRAM[144][8];

//反显函数
void OLED_ColorTurn(uint8_t i)
{
	if(i==0)
		{
			OLED_WR_Byte(0xA6,OLED_CMD);//正常显示
		}
	if(i==1)
		{
			OLED_WR_Byte(0xA7,OLED_CMD);//反色显示
		}
}

//屏幕旋转180度
void OLED_DisplayTurn(uint8_t i)
{
	if(i==0)
		{
			OLED_WR_Byte(0xC8,OLED_CMD);//正常显示
			OLED_WR_Byte(0xA1,OLED_CMD);
		}
	if(i==1)
		{
			OLED_WR_Byte(0xC0,OLED_CMD);//反转显示
			OLED_WR_Byte(0xA0,OLED_CMD);
		}
}


void OLED_WR_Byte(uint8_t dat,uint8_t cmd)
{
	uint8_t * data = &dat;
	if(cmd)
	  OLED_DC_Set();
	else
	  OLED_DC_Clr();
	OLED_CS_Clr();

HAL_SPI_Transmit(WHICH_SPI,(uint8_t *)data,1,200); //需根据实际情况修改

	OLED_CS_Set();
	OLED_DC_Set();
}

//开启OLED显示
void OLED_DisPlay_On(void)
{
	OLED_WR_Byte(0x8D,OLED_CMD);//电荷泵使能
	OLED_WR_Byte(0x14,OLED_CMD);//开启电荷泵
	OLED_WR_Byte(0xAF,OLED_CMD);//点亮屏幕
}

//关闭OLED显示
void OLED_DisPlay_Off(void)
{
	OLED_WR_Byte(0x8D,OLED_CMD);//电荷泵使能
	OLED_WR_Byte(0x10,OLED_CMD);//关闭电荷泵
	OLED_WR_Byte(0xAF,OLED_CMD);//关闭屏幕
}

//更新显存到OLED
void OLED_Refresh(void)
{
	uint8_t i,n;
	for(i=0;i<8;i++)
	{
	   OLED_WR_Byte(0xb0+i,OLED_CMD); //设置行起始地址
	   OLED_WR_Byte(0x00,OLED_CMD);   //设置低列起始地址
	   OLED_WR_Byte(0x10,OLED_CMD);   //设置高列起始地址
	   for(n=0;n<128;n++)
		 OLED_WR_Byte(OLED_GRAM[n][i],OLED_DATA);
  }
}
//清屏函数
void OLED_Clear(void)
{
	uint8_t i,n;
	for(i=0;i<8;i++)
	{
	   for(n=0;n<128;n++)
			{
			 OLED_GRAM[n][i]=0;//清除所有数据
			}
  }
	OLED_Refresh();//更新显示
}

//画点
//x:0~127
//y:0~63
void OLED_DrawPoint(uint8_t x,uint8_t y)
{
	uint8_t i,m,n;
	i=y/8;
	m=y%8;
	n=1<<m;
	OLED_GRAM[x][i]|=n;
}

//清除一个点
//x:0~127
//y:0~63
void OLED_ClearPoint(uint8_t x,uint8_t y)
{
	uint8_t i,m,n;
	i=y/8;
	m=y%8;
	n=1<<m;
	OLED_GRAM[x][i]=~OLED_GRAM[x][i];
	OLED_GRAM[x][i]|=n;
	OLED_GRAM[x][i]=~OLED_GRAM[x][i];
}


//画线
//x:0~128
//y:0~64
void OLED_DrawLine(uint8_t x1,uint8_t y1,uint8_t x2,uint8_t y2)
{
	uint8_t i,k,k1,k2;
	if((x2>128)||(y2>64)||(x1>x2)||(y1>y2))return;
	if(x1==x2)    //画竖线
	{
			for(i=0;i<(y2-y1);i++)
			{
				OLED_DrawPoint(x1,y1+i);
			}
  }
	else if(y1==y2)   //画横线
	{
			for(i=0;i<(x2-x1);i++)
			{
				OLED_DrawPoint(x1+i,y1);
			}
  }
	else      //画斜线
	{
		k1=y2-y1;
		k2=x2-x1;
		k=k1*10/k2;
		for(i=0;i<(x2-x1);i++)
			{
			  OLED_DrawPoint(x1+i,y1+i*k/10);
			}
	}
}
//画方形;x:0~127 y:0~63
//x1,y1,左上角坐标；x2,y2,右下角坐标
void OLED_DrawSquare(uint8_t x1,uint8_t y1,uint8_t x2,uint8_t y2)
{
	OLED_DrawLine(x1,y1,x2,y1);
	OLED_DrawLine(x1,y2,x2,y2);
	OLED_DrawLine(x1,y1,x1,y2);
	OLED_DrawLine(x2,y1,x2,y2);
}
//x,y:圆心坐标
//r:圆的半径
void OLED_DrawCircle(uint8_t x,uint8_t y,uint8_t r)
{
	int a, b,num;
    a = 0;
    b = r;
    while(2 * b * b >= r * r)
    {
        OLED_DrawPoint(x + a, y - b);
        OLED_DrawPoint(x - a, y - b);
        OLED_DrawPoint(x - a, y + b);
        OLED_DrawPoint(x + a, y + b);

        OLED_DrawPoint(x + b, y + a);
        OLED_DrawPoint(x + b, y - a);
        OLED_DrawPoint(x - b, y - a);
        OLED_DrawPoint(x - b, y + a);

        a++;
        num = (a * a + b * b) - r*r;//计算画的点离圆心的距离
        if(num > 0)
        {
            b--;
            a--;
        }
    }
}



//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~63
//size:选择字体 12/16/24
//取模方式 逐列式
void OLED_ShowChar(uint8_t x,uint8_t y,uint8_t chr,uint8_t size1)
{
	uint8_t i,m,temp,size2,chr1;
	uint8_t y0=y;
	size2=(size1/8+((size1%8)?1:0))*(size1/2);  //得到字体一个字符对应点阵集所占的字节数
	chr1=chr-' ';  //计算偏移后的值
	for(i=0;i<size2;i++)
	{
		if(size1==12)
        {temp=asc2_1206[chr1][i];} //调用12 06字体
		else if(size1==16)
        {temp=asc2_1608[chr1][i];} //调用16 08字体
		else if(size1==24)
        {temp=asc2_2412[chr1][i];} //调用24 12字体
		else return;
				for(m=0;m<8;m++)           //写入数据
				{
					if(temp&0x80)OLED_DrawPoint(x,y);
					else OLED_ClearPoint(x,y);
					temp<<=1;
					y++;
					if((y-y0)==size1)
					{
						y=y0;
						x++;
						break;
          }
				}
  }
}


//显示字符串
//x,y:起点坐标
//size1:字体大小
//*chr:字符串起始地址
void OLED_ShowString(uint8_t x,uint8_t y,uint8_t *chr,uint8_t size1)
{
	while((*chr>=' ')&&(*chr<='~'))//判断是不是非法字符!
	{
		OLED_ShowChar(x,y,*chr,size1);
		x+=size1/2;
		if(x>128-size1)  //换行
		{
			x=2;//x=0
			y+=size1;
    }
		chr++;
  }
}

//m^n
uint32_t OLED_Pow(uint8_t m,uint8_t n)
{
	uint32_t result=1;
	while(n--)
	{
	  result*=m;
	}
	return result;
}

//显示2个数字
//x,y :起点坐标
//len :数字的位数
//size:字体大小
void OLED_ShowNum(uint8_t x,uint8_t y,uint32_t num,uint8_t len,uint8_t size1)
{
	uint8_t t,temp;
	for(t=0;t<len;t++)
	{
		temp=(num/OLED_Pow(10,len-t-1))%10;
			if(temp==0)
			{
				OLED_ShowChar(x+(size1/2)*t,y,'0',size1);
      }
			else
			{
			  OLED_ShowChar(x+(size1/2)*t,y,temp+'0',size1);
			}
  }
}

//显示汉字
//x,y:起点坐标
//num:汉字对应的序号
//取模方式 列行式
void OLED_ShowChinese(uint8_t x,uint8_t y,uint8_t num,uint8_t size1)
{
	uint8_t i,m,n=0,temp,chr1;
	uint8_t x0=x,y0=y;
	uint8_t size3=size1/8;
	while(size3--)
	{
		chr1=num*size1/8+n;
		n++;
			for(i=0;i<size1;i++)
			{
				if(size1==16)
						{temp=Hzk1[chr1][i];}//调用16*16字体
				else if(size1==24)
						{temp=Hzk2[chr1][i];}//调用24*24字体
				else if(size1==32)
						{temp=Hzk3[chr1][i];}//调用32*32字体
				else if(size1==64)
						{temp=Hzk4[chr1][i];}//调用64*64字体
				else return;

						for(m=0;m<8;m++)
							{
								if(temp&0x01)OLED_DrawPoint(x,y);
								else OLED_ClearPoint(x,y);
								temp>>=1;
								y++;
							}
							x++;
							if((x-x0)==size1)
							{x=x0;y0=y0+8;}
							y=y0;
			 }
	}
}

//num 显示汉字的个数
//space 每一遍显示的间隔
void OLED_ScrollDisplay(uint8_t num,uint8_t space)
{
	uint8_t i,n,t=0,m=0,r;
	while(1)
	{
		if(m==0)
		{
	    OLED_ShowChinese(128,24,t,16); //写入一个汉字保存在OLED_GRAM[][]数组中
			t++;
		}
		if(t==num)
			{
				for(r=0;r<16*space;r++)      //显示间隔
				 {
					for(i=0;i<144;i++)
						{
							for(n=0;n<8;n++)
							{
								OLED_GRAM[i-1][n]=OLED_GRAM[i][n];
							}
						}
           OLED_Refresh();
				 }
        t=0;
      }
		m++;
		if(m==16){m=0;}
		for(i=0;i<144;i++)   //实现左移
		{
			for(n=0;n<8;n++)
			{
				OLED_GRAM[i-1][n]=OLED_GRAM[i][n];
			}
		}
		OLED_Refresh();
	}
}

//配置写入数据的起始位置
void OLED_WR_BP(uint8_t x,uint8_t y)
{
	OLED_WR_Byte(0xb0+y,OLED_CMD);//设置行起始地址
	OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
	OLED_WR_Byte((x&0x0f),OLED_CMD);
}

//x0,y0：起点坐标
//x1,y1：终点坐标
//BMP[]：要写入的图片数组
void OLED_ShowPicture(uint8_t x0,uint8_t y0,uint8_t x1,uint8_t y1,uint8_t BMP[])
{
	uint32_t j=0;
	uint8_t x=0,y=0;
	if(y%8==0)y=0;
	else y+=1;
	for(y=y0;y<y1;y++)
	 {
		 OLED_WR_BP(x0,y);
		 for(x=x0;x<x1;x++)
		 {
			 OLED_WR_Byte(BMP[j],OLED_DATA);
			 j++;
     }
	 }
}
//
//
void OLED_Printf(uint8_t str[])
{
OLED_Clear();
OLED_ShowString(2,2,str,12);
OLED_Refresh();
}
//OLED的初始化
void OLED_Init(void)
{
	
	
	OLED_RES_Clr();
	HAL_Delay(200);
	OLED_RES_Set();

	OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
	OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
	OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
	OLED_WR_Byte(0x40,OLED_CMD);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
	OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
	OLED_WR_Byte(0xCF,OLED_CMD);// Set SEG Output Current Brightness
	OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping     0xa0左右反置 0xa1正常
	OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction   0xc0上下反置 0xc8正常
	OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
	OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
	OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
	OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset	Shift Mapping RAM Counter (0x00~0x3F)
	OLED_WR_Byte(0x00,OLED_CMD);//-not offset
	OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
	OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
	OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
	OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
	OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
	OLED_WR_Byte(0x12,OLED_CMD);
	OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
	OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
	OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
	OLED_WR_Byte(0x02,OLED_CMD);//
	OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
	OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
	OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
	OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
	OLED_WR_Byte(0xAF,OLED_CMD);
	OLED_Clear();
}
